A mayday was called when the firefighter fell through the first floor of the vacant two-story building near Calumet Avenue and Martin Luther King Drive. Other firefighters pulled him out through a basement window, officials said.

The fire had started in the basement but was already out, Langford said.

The building stretches about half a block, between Calumet Avenue and an alley to the east. The building's first-floor windows were boarded up.

A burst of thunderstorm activity across the Chicago area in Sunday afternoon resulted in multiple injuries and a death at an event in west suburban Wood Dale, the collapse of a dome in northwest suburban Rosemont and the temporary evacuation of the music festival Lollapalooza in Grant Park downtown.